HEAR ME OUT-

You're talking about ZA or gen 10?
Either way i don't really see a pattern.
Og three in gen 1,
Espeon and Umbreon in gen 2,
Glaceon and Leafeon in gen 4,
Then Sylveon in gen 6.
If it's like a 2 gen always has new Eevee, gen 8 already broke that(not counting Espeon and Umbreon cause i'm pretty sure gen 2 was supposed to be Pokemon's last game)

ZA could possibly have a new eeveelution lost to time

I doubt it, plus Legends Arceus didn't give us a new Eeveelution

Tbh I feel like a 10th Eeveelution is like Half Life 3

Everybody joked about it, but it may or may not be a possibility, we don't know

Maybe...? But what type is the question

Every type and any type

I feel like there’s a pattern and we’re way over due for a new one

THIS BETTER HAPPEN OR I WILL-
IDK WHAT ILL DO BUT ILL DO SOMETHNG

I KNOW BRO 😭

Maybe it will be a regional valentine's of eevee which has the other types that eevee doesn't have

*variety

i mean variant agh!!!

MAYBE BUT IF THERES NOT IMMA SCREAM!!!

Same

I wanna make a petition for more eeveelutions

I doubt it. The Eeveelutions follow a specific typing pattern; their types are always something in the card game. The only eligible types left are fighting and dragon. While Dragon seems the most likely since it's Kalos, and you people know Kalos, I highly doubt that they'll add it because Sylveon was the last Eeveelution to be released, and the only one after the original three to not come in a pair, meaning that Sylveon very well could have been the last Eeveelution to be released. While Dragon could pair with Sylveon, since it's Kalos, there's probably a reason why Sylveon was released on its own.

Personally I think the next eeveelution might be a Poison type since that's what they originally wanted to do with Umbreon, or a Steel type if they decided to make a paradox eeveelution